Besides the Nintendo eShop, today's 3DS system update allows players to transfer DSiWare titles, photos, and music over to the 3DS.

Pikmin transfer the data in what can only be described as cute.

Once you transfer over the data, you cannot transfer it back. It took website Vooks.net an hour to transfer 34 DSiWare titles over.

Transferring DSi Games to the 3DS Is So Easy!

Video: DSi to 3DS transfers in action - the short version [Vooks]